There are 2 modes, one is "full open", and the other is limited mode. If select limited mode, it will start "queue up" function and work automatically.

1) Supply power to conference microphones, can support 90 microphones without built-in loudspeaker or 60 microphones with built-in loudspeaker, totally can support more than 200 microphones if add extend main units.

2) Can drive up to 80 pieces microphones, (60 pieces microphones that built-in speaker), and can drive about 200 units by adding expansion unit.

3) The system has "FREE" and "LIMIT" conference mode, (limit the quantity of the delegate units, such as "1", "2", "3", "5"). It is able to choose conference mode in the front panel directly, when choose FREE conference mode, all microphones can be turned on, when choose LIMIT conference mode, the delegate unit which turned on at the same time can not excess the quantity Chosen, if turned on more, it will enter queue application automatically (6 is the most to make application) The microphone who make application first will turn on (automatically proceed according to queue order) once others is turned off. Chairman unit can not be limited, it can turn on at any time.

4) The volume of the microphone is adjustable.

5) External audio source can input by MIC or Stereo AUX, output to microphones’ speaker and main outputs.

2) The distance from microphone to mouth is about 300mm, used with peripheral equipment, pick up distance can reach 450mm.

3) Capacitive microphone core as well as microphone tube, are both anti-interference of phone signal

4) Talk key and microphone stem with ring of light, it is red when turning on, flashing red when make application.

5) When choose limit conference mode, the delegate unit which turned on at the same time can not excess the quantity chosen, if turned on more, it will enter queue application automatically (6 is the most to make application) The microphone who make application first will turn on(automatically proceed according to queue order) once others is turned off.

6) It is able to turn on/off microphone freely in "FREE" conference mode

9) With earphone jack, volume is adjustable, be able to listen by earphone and also output audio signal to personal recording devices by earphone jack

10) Microphone built-in speaker is optional (8 ohm/2 w), volume is adjustable, do not need to use external public address devices for small conference room. When insert earphone or turn on microphone, it automatically mute to avoid acoustic feedback

11) Frequency response: 100-16000Hz, sensitivity is: -44±4dB

12) Central Unit supplies power for microphones, input voltage 20V DC which is in safe range

13) Special "T" type hand in hand daisy chain, simple installation

Chairman unit

1) With Priority key, all delegate units will be mute when press the priority key, and then returns to previous status by loosing the priority key.

2) Chairman unit can be put in any place among all microphones, no limitation for quantity.

3) There is no limitation for the chairman unit, it can be turned on at any time.